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A kind of magnesium indium phosphate red or green fluorescent powder and its preparation

A fluorescent powder and phosphate technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of rare exploration of new matrix materials, and achieve the effects of short afterglow time, simple preparation process and high luminous intensity

Active Publication Date: 2017-12-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the research work in this field is based on the doping modification of the reported compounds, or the research on a series of isomorphic compounds of the more mature matrix, while the work of exploring new matrix materials is relatively rare.

Method used

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  • A kind of magnesium indium phosphate red or green fluorescent powder and its preparation
  • A kind of magnesium indium phosphate red or green fluorescent powder and its preparation
  • A kind of magnesium indium phosphate red or green fluorescent powder and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: Mg 25 In 30 P 45 o 182.5 Preparation of Phosphor Matrix

[0049] Weigh 0.1947g MgO, 0.8049g In 2 o 3 , 1.0004g NH 4 h 2 PO 4 Put it in a beaker, add an appropriate amount of nitric acid to dissolve the raw materials, add a small amount of polyvinyl alcohol and an appropriate amount of deionized water after the solution is clarified, heat and stir until it is completely evaporated, put the beaker in a drying oven to dry and grind it evenly; then carry out two final steps Sintering (the sintering temperature of the first stage is 1200°C, after 15 hours of heat preservation, it is cooled to room temperature with the furnace, and ground for 10 minutes; the sintering temperature of the second stage is 1200°C, and it is cooled to room temperature with the furnace after 15 hours of heat preservation, and the heating rate of the two steps of sintering is 5 °C / min). Take out the burnt sample and grind it to get Mg 25 In 30 P 45 o 182.5 Phosphor matrix. A...

Embodiment 2

[0050] Example 2: Mg 23 In 29 P 44 o 176.5 Preparation of Phosphor Matrix

[0051] Weigh 0.1851g MgO, 0.8040g In 2 o 3 , 1.0108g NH 4 h 2 PO 4 , the rest of the steps are the same as in Example 1.

Embodiment 3

[0052] Example 3: Mg 27 In 33 P 47 o 194 Preparation of Phosphor Matrix

[0053] Weigh 0.1965g MgO, 0.8272g In 2 o 3 , 0.9763g NH 4 h 2 PO 4 , the rest of the steps are the same as in Example 1.

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Abstract

The invention provides magnesium-indium phosphate red and green fluorescent powder and a preparation method thereof. The chemical formula of the magnesium-indium phosphate red and green fluorescent powder is Mg21-28(In1-xLnx)28-34P42-48Oy (x=0.02-0.11, y=168-199), wherein Ln is rare earth ion Eu or Tb. In the fluorescent powder, a novel phosphate compound Mg21-28In28-34P42-48Oy (y=168-199) is used as a substrate, different rare earth elements are added into the substrate, and therefore the fluorescent material having strong emission in different spectral regions under ultraviolet excitation can be obtained. The preparation method is a wet-chemical-solid phase sintering method. The fluorescent powder has good optical performance and can well meet the requirements of a three-band-color fluorescent lamp.

Description

Technical field: [0001] The invention relates to the field of rare-earth luminescent materials, in particular to a red or green rare-earth phosphate-based fluorescent powder that can be applied to tricolor fluorescent lamps and a preparation method thereof. Background technique: [0002] Most of the current commercial light sources need to use phosphors for light conversion. Fluorescent lamps made of rare earth tricolor phosphors are very efficient and energy-saving new light sources, and are the key development direction of the world's lighting sources. At present, the production capacity of various rare earth luminescent materials in my country has reached 10,000 tons. In 2009, my country produced about 7,200 tons of various rare earth phosphors, and the output of rare earth three-color fluorescent lamps exceeded 3 billion, ranking first in the world. Tricolor fluorescent lamps (energy-saving lamps) account for about 75% of rare earth luminescent materials, and are one of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/71
CPCC09K11/71C09K11/7738C09K11/7753
Inventor 蔡格梅张静司家勇金展鹏
Owner CENT SOUTH UNIV
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